Spark-arrester.



O .N.TBRRY, SPARK ARRESTER.

APPLIOATION FILED FEB.21, 1911.

Patented Allg. 26, 1913.

3 SHEETS-SHEET 1.

0. N. TERRY.

SPARK ARRESTBR.

APPLICATION FILED Imm, 1911.

3 SHEETS-SHEET 2.

`'Infjnena Aug. 26, 1913.

o. N. TERRY.

SPARK ARRESTBR.

APPLICATION FILED FEB.21, 1911.

Patented Aug. 26, 1913.

a SHEETS-SHEET a. 4

COLUMBIA PLANOGRAPH C0.,\P{ASHINOTO. n. C`

UNITED STATES PATENT OFFICE.

OTIS N. TERRY, OF UNIVERSITY PLACE, NEBRASKA.y

SPARK-ARRESTER.

To all lwhom z't may concern:

Be it known that I, Oris N. TERRY, a citizen of the United States, residing at University Place, in the county of Lancaster and State of Nebraska, have invented certain new and useful Improvements in Spark- Arresters, of which the following is a specication.

This invention relates to improvement-s in spark arresters. In regions where it becomes necessary to use lignite coal for fuel for locomotives it has been found that great danger is incurred by the liability of forest and other lires being ignited by the iying of sparks from such coal and this device is primarily designed to prevent the emission of such sparks from the loco-motive. It is also adapted for use with other fuel.

By my improved construction I provide in place of the screen or rods customarily used in such a device a series of flat bars designed to give a free passage of the smoke and allow sufficient draft and at the same time prevent the passage of sparks and fiery cinders.

Another object of my invention is to provide for the keeping of the spaces between such bars free from cinders and other obstructions which would tend to close the amount of air space.

Throughout the drawings like reference characters refer to like elements.

In the drawings-Figure 1 is a side outline view of a locomotive showing my spark arrester applied thereto. Fig. 2 is a transverse cross section through the spark arrester and showing its method of attachment to the locomotive. Fig. 3 is a perspective detail view showing one arrangement of my link belt construction. Fig. 4 is a perspective detail view showing another arrangement of my link belt construction with a cleaner device. Fig. 5 is a perspective view of my device showing the cleaner device used in connection with the construction wherein the screen bars are mounted upon thimbles. Fig. 6 shows another modification. Fig. 7 is a section taken along the line 7 0f Fig. 6. Fig. 8 is a section taken along the line 8 of Fig. 6. Fig. 9 is a perspective detail view of the construction shown in Fig. 6, showing several of the members disassembled. Fig. 10 is another modification of the link belt construction. Fig. 11 is a sectional detail view of the con- Specication of Letters Patent.

Application led lFebruary 21, 1911.

Patented Aug. 26,1913.

Serial No. 609,909.

struction shown in Fig. 10, showing the means of fastening to the locomotive.

In Fig. l I have shown a conventional form of locomotive, in which A designates the smoke outlet from the smoke-box; B is a forced draft device; C is a bafie, ordinarily used to maintain an equal distribution of hea-t passing through the boiler l'ues; and D refers to the sides of the smoke-box, to which I prefer to attach my spark-arresting device.

11 designates transverse rods, upon which are supported the screen bars 12 arranged as shown in the drawing.

In the construction shown inFig. 3, the screen bars 12 are provided with perforations 12 at one of their ends, fitting the rods 11 closely, while at the other ends of said rods l2 are larger' perforations 12 designed to fit loosely on the rods 11, for a purpose hereinafter t0 be described.

In the construction shown in Fig. l both ends of the rods 12 are provided with smaller perforations 12 fitting the rods 11 closely.

Figs. 6, 7, and 8 show a modification of my link belt construction in which screen bars 122L provided with perforations 12c are located on the body portion 15 of thimbles 15. These thimbles are provided with collars 15 at one end, and are supported on the transverse rods l1. In this construction the rods 12a are located at predetermined intervals beginning at the side portions of the spark arrest-er adjacent the sides of the locomotive smoke box, and between these bars 12a the screen bars 12b are arranged similarly to 12a upon the thimbles 15, but having larger perforations 121 at their ends designed to lit loosely upon the portions 15 of the thimble l5.

In Fig. 10 I have shown still another modification of my link belt construction, in which the transverse rods 11 are located in staggered relation, so that the screen bars 12 are arranged in a Zig-Zag. By this construction I provide a greater air space and smoke passage for the same transverse area of the smoke-box.

In the construction where the screen bars are shown with large perforations fitting loosely on the transverse rod, it is not necessary to provide an automatic cleaning eifect, since the loose lit at one or both ends of the screen bars will enable them to vibrate slightly with the motion of the engine and any cinders etc. becoming lodged between the bars will be dislocated and dropped to the bottom of the smoke-box.

In the construction of Figs. 6, 7 and 8 'the bars 12:L being closely fitted to the thimbles 15 furnish a certain amount of rigidity to the spark arresting device, while the intermediate bars 12b being located loosely on the thimbles 15 on the intermediate portion of the spark arrester, where the upward draft is produced, by their vibration will effeet the cleaning of the screen bars automatically at the point where needed. The collar 15 serves to keep the bars 12b in spaced relation and prevent an undue displacement laterally.

In Figs. l and 5 I have shown a positive cleaning device comprising upright bars 25 located at about the center of the screen bars 12 and having heads 25 at their lower ends provided with non-circular perforations 25 by which they are mounted upon rods 26 of corresponding cross section. Each rod 2G is provided with a circular journal portion 26L supported in depending bearing hangers 27, which are in turn fastened to the angle bars 21. At the outer extremity of each rod 26 is fixed a crank arm 28 to which is connected an operating lever 29 jointed at 29', which terminates at its other end in a handle 30 intended to be located in the cab of a locomotive or other suitable place so that upon reciprocation of the operating lever 29 the cleaning members 25 through the medium of the bar 26 are oscillated backward and forward and dislodge any Obstructions from between the screen bars.

The transverse rods 11 of the spark arrester are threaded into engagement or otherwise fixed through apertures 20 in the flange 2Oa of the side frame member or angle bars 20. Suitably secured to the sides D of the locomotive smoke-box are angle bars 21 each having a fiange inwardly turned. The flanges 20b of the angle bars 2O are suitably secured to the inwardly turned flanges of the angle bars 21, thus affording a convenient and practical means of attachment of' the spark arrester to the locomotive smoke-box.

The advantage of my screen bar construction over the ordinary screen or rounded bars used is that I may construct them of thin material and by locating them with their' planes in an approximately vertical plane and in mutual parallel relation a maximum of air space is provided without decreasing the screening effect or the strength of the screen. Another advantage of the link belt construction is that it is readily attached to ordinary locomotives and may be easily fitted thereto since more or less screen bars may be easily added to either side, or if the length of the smoke-box is not adapted to an even number of the screen bars, the device may still be readily fitted thereto by adding a set of shorter rods at either end. Also another advantage is that according to the liability of the fuel used vto break into cinders or small burning lumps the bars may be arranged with a predetermined suitable space between.

It is to be noted that in connection with the link belt type of my device, I arrange the screen bars on each transverse rod in such a manner that alternate bars extend to `the next rod in one direction, while intermediate bars extend to the next rod in the opposite direction. By this arrangement an equal spacing may be preserved between the bars, and in the construction shown in Figs. .3 and 4 the ends of alternate bars may be `used to space intermediate bars and vice versa by having the ends of the bars restclosely together on the rods.

I claim:

1. In a spark arrester, a series of transverse rods and thin fiat screen bars having a perforation in each extremity, said transverse rods passing through said perforation in said screen bars, said screen bars lying in a vertical plane and being suitably spaced apart and wholly supported by said transverse rods, said rods being fixedly secured adjacent their extremities to side frame members.

2. In a spark arrester, a series of transverse rods, and thin flat screen bars having perforations in each extremity, said transverse rods passing through the perforations in said screen bars, on each of said rods alternate screen bars extending from said rod to the next rod in one direction and intermediate screen bars extending from said rod to the next rod in the opposite direction, said rods being fixedly secured adjacent their extremities to side frame members.

3. A screen comprising a series of transverse rods, thin fiat screen bars having aper tures at their extremities, said rods passing through said apertures, whereby said bars will be in a mutually parallel relation and each lie in a vertical plane alternate of said screen bars, extending from one transverse rod to the next rod in one direction and intermediate of said screen bars extending from said first transverse rod to the next rod in opposite direction, said rods being fixedly secured adjacent their extremities to side f y'ame members.

4. In a spark arrester, a series of transverse rods and thin flat screen bars, said screen bars having apertures in each ex tremity, said transverse rods passing through said apertures in said screen bars, said screen bars having one aperture larger than said rod whereby said screen bars may vi brate upon said rods to allow the dislodgment of particles lodging between said screen bars.

5. In a spark arrester, a series of transverse rods, thimbles mounted on said rods, thin iiat screen bars having apertures in each extremity adapted to fit over said thimbles, whereby the said bars may be supported by said thimbles.

6. In a spark arrester, a series of transverse rods, thimbles mounted on said rods, thin flat screen bars having apertures in each extremity adapted to fit over said thimbles, said rods having one aperture larger than said thimbles whereby said bars may vibrate on said thimbles.

7. In a device of the class described, a series of transverse rods, spacing thimbles mounted on said rods, each of said thimbles being provided with a collar at one extremity the other extremity of each of said thimbles lying against the collared end of the adjacent thimble on said rods, screen bars provided with apertures in their extremities adapted to lit over said thimbles, whereby the said bars may be supported in spaced parallel relation by said thimbles.

8. Ina device of the class described, a series of transverse rods, spacing thimbles mounted on said rods, each of said thimbles being provided with a collar at one extremity, the other extremity of each of said thimbles lying against the collared end of the adjacent thimble on said rods, screen bars provided with apertures in their extremities adapted to fit over said thimbles, whereby the said bars may be supported in spaced parallel relation by said thimbles,

certain of said screen bars having relatively larger apertures, whereby said screen bars will be loosely supported by and adapted to vibrate upon said thimbles.

9. In a device of the class described, a series of thin flat bars suitably spaced apart and carried in parallel relation by transverse supporting means, a cleaner for said device, said cleaner comprising bars upwardly extending between the said screen bars, rotatable rods, said cleaner bars being mounted at one extremity on said rotatable rods, whereby partial rotationmay be imparted to said cleaner bars to remove substances lodged between said bars.

l0. In a device of the class described, a series of transverse rods, thin flat screen bars perforated at each extremity and mounted upon said rods in spaced and parallel relation, alternate screen bars extending from one of said rods to the next rod in one direction, and intermediate screen bars extending from said rod to the next rod in the opposite direction, a cleaner for said device, said cleaner comprising a plurality of sets of parallel bars, each set upwardly extending between the screen bars carried by successive rods, said sets of cleaner bars being mounted on rods, means for rotating said rods simultaneously to impart forward and backward movement to said cleaner bars.

In testimony whereof, I have subscribed my name.

OTI S N. TERRY.

Witnesses:

THos. I-I. SHERIDAN, CARL A. RICHMOND.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. C. 

